Ubuntu has these similar features in whatever default window manager thing it uses (I don't know the difference between window manager, desktop, etc for Linux). It also has "geographical desktop management," i.e., in windows and mac your separate desktops are to the left and right only, on ubuntu they can be up, down, left, or right. Might be trivial to some, but to me, having a "physical space" metaphor for my workflow is tremendously helpful.

Also you can drag left/right to snap to one half of a screen.

Anyway I tried to replicate this behavior on Mac with spectacle. It's meh. If you fuck up and fullscreen something and then try to half screen it, it seems to break horribly.